#include<stdio.h>
    #include<stdlib.h>
    #include<fcntl.h>
    #include<unistd.h>
    #include<string.h>

    int main(int argc, char* argv[]) {
    	
    	int fird,ent,ents;
    	off_t i;
    	char tst[256];
    	size_t n=1,m=1;
    	memset(tst,0,256);

    		if(argc!=3){
    			printf("erreur : %s <Nom Fichier> <offset>\n",argv[0]);
    			exit(-1);
    		}

    	fird=open(argv[1],O_CREAT|O_RDONLY,0600);
    		if(fird==-1){
    			perror("On ne peut pas ouvrir cela en O_WRONLY");
    			exit(1);
    		}

    	ent = strtol(argv[2],NULL,10);

    	lseek(fird,ent*4,SEEK_SET);
    	i=read(fird,&ents,4);
    	if(i==0){
    		printf("Offset is out of range!\n");
    		exit(1);
    	}
    	printf("The number at offset %d is 0x%08x --> %d\n",ent,ents,ents);

    	close(fird);

    	return EXIT_SUCCESS;
    }